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Chilling.

35

jectiles for large guns; and, in fact, all classes of work required to
stand wear and tear, and  not   especially  needing   machining.

SAMP,

Pig. 49 will explain the methods of chilling:A, a car \vheel
rim; B, a* plate roll," and c, a shell. Rolls and bushes are
moulded upright, and share points made in an entire mould